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 Test Bank امتحان نووية سابق

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عدد الرسائل : 127
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الموقع : http://ahu-club.ahlamontada.com
تاريخ التسجيل : 13/10/2007

مُساهمةموضوع: Test Bank امتحان نووية سابق   الإثنين 22 أكتوبر 2007, 1:16 am

Test Bank

Nuclear Physics
Part (1)

Dr. M. Abu Shayeb



1. The atomic number Z, which equal the number of protons in the nucleus sometimes called
a) Size number
b) Spin number
c) Charge number
d) Orbit number
e) Atomic number

Ans:

2. The mass number A= Z+N, which equals the number of nucleons
a) Electrons + neutrons
b) Electrons + protons
c) Neutrons + protons
d) Electrons + protons + neutrons
e) Non of these answer

Ans:

3. Consider the following three nuclei: 12N, 13N, 14N. these nuclei have the same
a) Number of protons
b) Number of neutrons
c) Number of nucleons
d) Number of electrons and neutrons
e) All the above

Ans:

4. Nuclei stability can exist when the nuclear force dominates the coulomb
a) Attractive
b) Repulsive
c) Charge
d) Force
e) Energy

Ans:


5. The total energy of the nucleus is less than the combined energy of the separated nucleons, this difference in energy is called
a) Repulsive energy
b) Kinetic energy
c) Nuclear energy
d) Binding energy
e) Attractive energy

Ans:

6. Five major effects influence the binding energy of the nucleus in the liquid-drop model
a) Volume, energy, surface, coulomb attractive, symmetry, pairing effects
b) Volume, surface, coulomb repulsive, symmetry, pairing effects
c) Volume, mass, surface, symmetry, paring effects
d) Volume, energy, mass, coulomb repulsive, pairing effects
e) Non from these answer

Ans:

7. Out of these decays one can not occur
a)
b)
c)
d)
e)

Ans:

8. Each of the atomic constituents has a spin ½ in unit of h/2 and is an example of
The class of particles of half-integer spins known as?
a) Mesons
b) Bosons
c) Hadrons
d) Fermions
e) Baryons

Ans:





9. , the masses in this reactions is, 1.007825 (H), 18.998403u
(F) 15.994915u (O) and for He the mass is 4.002603u, where the atomic mass unit
(muc2) is 931.494 MeV. The Q value of the reaction is?
a) 8.11 MeV
b) 2.613 MeV
c) 8.71 x 10-3
d) 2.21 x 10-3
e) Zero

Ans:

10. Radioactive dating is a radioactivity decay law to determine the age of the materials. Perhaps the best known is?
a) Nitrogen dating
b) Oxygen dating
c) Carbon Dating
d) Helium dating

Ans:

11. If the nuclei in the target act independently, the event rate per nucleus exposed to
The beam is proportional to the incident flux, this constant is called?
a) Reaction flux rate
b) Incident flux rate
c) Cross section
d) Nuclear reaction rate
e) Non of these answer

Ans:

12. 1 fm is equal to
a) 10 -18 m
b) 10 -17 m
c) 10 -16 m
d) 10 -15 m
e) 10 -14 m

Ans:

13. The magnitude of the nuclear force depends on the relative spin orientations of
The
a) Nuclear
b) Nucleons
c) Nuclei
d) Nucleus
e) Quarks

Ans:

14. (2, 8, 20, 28, 50, 82, and 126), these numbers in nuclear physics known as.
a) Secret number
b) Magic numbers
c) Baryon numbers
d) Quantum number
e) Orbital numbers

Ans:


15. If we collide electron have an energy of 7 MeV with Positron have the same energy. The production particle will have an energy equal to
a) Zero MeV
b) 14 MeV
c) 49 MeV
d) 1 MeV
e) No particle will produce

Ans:

16. Unstable nuclei described as either?
a) Electron rich only
b) Proton rich only
c) Neutron rich only
d) Neutron or proton rich only
e) Electron or neutron or proton rich

Ans:

17. A nuclear reaction which occurs when the projectile interacts primarily in the
Surface of the target nucleus called
a) Compound reaction
b) Partly reaction
c) Direct reaction
d) Indirect reaction
e) Capture reaction

Ans:





18. If the entire photon energy is converted in the field of an atom into the creation of an electron-positron pair with total kinetic energy = E - 2mc2. This process called?
a) Attenuation
b) Pair production
c) Compton scattering
d) Photoelectron effect
e) Electron capture

Ans:

19. out of these detectors one are not in use as experimental nuclear physics methods
a) Ionization chamber
b) Geiger-Mueller counter
c) Scintillation couture
d) P-n- junction detector
e) Gamma knife

Ans:

20. A large amount of energy can occur from
a) light–ion interaction
b) heavy-ion interaction
c) peripheral interaction
d) Center of mass reaction
e) Laboratory reaction

Ans:
















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